export function base64ToFile(base64Data:string, filename:string) {
    // 将base64的数据部分提取出来
    const parts = base64Data.split(';base64,');
    const contentType = parts[0].split(':')[1];
    const raw = window.atob(parts[1]);
    
    // 将原始数据转换为Uint8Array
    const rawLength = raw.length;
    const uInt8Array = new Uint8Array(rawLength);
    for (let i = 0; i < rawLength; ++i) {
        uInt8Array[i] = raw.charCodeAt(i);
    }
    
    // 使用Blob对象创建文件
    const blob = new Blob([uInt8Array], {type: contentType});
    return new File([blob], filename, {type: contentType});
}

export function convertBase64ToBlob(base64:string) {
    const byteCharacters = atob(base64.split(',')[1]);
    const byteArrays = [];
  
    for (let i = 0; i < byteCharacters.length; i++) {
      byteArrays.push(byteCharacters.charCodeAt(i));
    }
  
    return new Blob([new Uint8Array(byteArrays)], { type: 'image/jpeg' });
  }
 